Ahoy there matey! Based on your search for a 150L geyser, I'd recommend the 150L Low Pressure Solar Geyser for R4000. As a solar powered option, it'll help ye save on electricity whilst heating water from the sun's rays. The geyser comes complete and ready to install, so no need for additional elements or trays. Do let me know if ye need anything else - my knowledge be growing each voyage but I may not have all the answers just yet. Fair winds to ye!
